<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style type="text/css">
        .a,.b,.c {
            box-sizing: border-box;
            border: 1px solid;
        }
    
        .wrap {
            width: 250px;
        }
    
        .a {
            width: 100px;
            height: 100px;
            float: left;
        }
    
        .b {
            width: 100px;
            height: 50px;
            float: left;
        }
    
        .c {
            width: 100px;
            height: 100px;
            display: inline-block;
        }
    </style>
</head>
<body>
    <div class="wrap">
        <div class="a">a</div>
        <div class="b">b</div>
        <div class="c">c</div>
    </div>
</body>
</html>
